4 Lb Soil Vigor (Tm) Super Absorbent Polymer, Moisture Trap for All Plants, Trees, Shrubs, Vegetable , Flower Gardens, and Lawns of All Sizes. SOIL VIGOR is made of polymer for water keep Hydro Moisture Terra wet for all plants, trees, shrubs, vegetable and flower gardens, and lawns of all sizes. Soil Vigor is long lasting and reusable for up to 7 years. Soil Vigor Reduces watering frequency by up to 50%.Reduces soil compaction and increases aeration. Stores water and nutrients in the root zone, Maximize time intervals between irrigation cycles. Environmentally safe. Non-toxic. Biodegradable. Simple to use: 1. Mix Soil Vigor into your potting soil. Make sure to measure how much soil your container can hold before combining it with Soil Vigor. 2. Leave a three-inch space from the top of your soil mixture, to the rim of your container, because Soil Vigor will expand tremendously after watering. 3. Ready to use for new or transplanting plants. Caution: Do not consume or inhale. Wash hands with soap after use. Wipe up spills with damp towel and dispose properly.